I'm at the end of the game with final bosses second form is absolutely destroying me in an impossible manner. I'm trying to get more money, more items, and more powerful demons or at least demons with the most optimal move set.

The demons that are supposed to be the highest level at the cosmic egg, but there are no demons in the cosmic egg anymore for some reason. So I've been going to ichigaya or other places and working from weaker demons and leveling across. If I had more money this wouldn't be a problem but what is the best way to go about this?

My current team is Phys build nanashi with almost all my stat points dumped at str/agi/luck. Then I have Mara, Samael, Inanna, Odin, Krishna, and shiva. I'm still getting murked because when the final boss uses his ultimate move it just wipes me pretty quickly and I dont have enough press turns to get my team back in order or grab some secondary guys.

I try and buff, and debuff but I walk into the battle with very little MP and I can't seem to get any great chakra type items playing the game normally.

This is on War, and I'm ready to close this game out, almost ready to turn down the difficulty out of frustration.